Picking-motion-checking means for looms



C. VAN DE VORT.

PICKING MOTION CHECKING MEANS FOR LOOMS.

APPLICATION FILED FEB. 5. 1920.

Patented June 8, 1920.

W/TNESS.'

UNITED STATES CAMIEL VAN DE VOORT, OF HALEDON, NEW JERSEY.

PICKING-MOTION-CHECKING MEANS FOR LOOMS.

Specification of Letters Patent.

Patented June 8, 1920.

Application sied February 5i, 1920. sei-iai No. 356,524.

To all lwwm t may concern:

Be it known that I, CAMiiiL VAN DE VooRT, a subject of the King of Belgium, residing at Haledon, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Picking-Motion-Checking Means for Looms, of which the following is a specification.l

The object of this invention is to provide an eiiicient spring device, for use particularly in connection with box looms, for cushioning the action and insuring prompt return of the picking means after each picking stroke. For the ordinary buffer device consisting of a strap, perforated by the rod on which the picker slides and folded back and forth several times, I substitute a springpressed pivoted member which is associated with certain other parts of the loom in such manner as to operate with considerably greater eiiiciency than such strap. Preferably the said member is a casting or more or less weighty rocking element to which is attached a spring arm or extension, such member being pivoted in a bracket which may be readily bolted to any existing loom box-guiding frame and having an adjustable spring-connection with the bracket.

In the drawing,

Figure l is a rear view of the end portion of a loom embodying the invention; n

Fig. 2 is a plan of a fragment of what is shown in Fig. l;

Fig. 3 'is a plan of my device removed from the loom, partly broken away; and

Fig. l is a section on line 4-4r, Fig. 3.

The framing a, forming a part of the rocking hatten-including structure 7o of a loom, has the boxes c guided therein in the usual way, and at the back it has the usual horizontal rod Z suitably support-ed by ears e and forming with the back face of the framing a slot 7, the rod serving to guide the picker g and the slot receiving the picker stick fr which penetrates the picker and is fulcrumed in structure o on the stud h, being adapted to receive its working or picking stroke from well-known means i and to be returned by the usual spring j.

To the under side of framing a I bolt a bracket k, and in this bracket is clamped, by nuts Z screwed thereon, a shaft m parallel with stud it. On the shaft are xed two spaced collars n and o, the means for aifxing them to the shaft being set screws a 0 permitting their adjustment rotatively of and on the shaft; collar a has an outwardly projecting stop-lug n. On the shaft are also a lever (to be described) and a spring p, which latter is coiled about the shaft and has one end engaged with the lelver and the other engaged in a hole in colar o.

The said lever includes a fulcrum or body part having a boss or hub-portion Q journaled on the shaft and opposite arms r s, the longer, 1, of which receives in a hole therein one end of spring p and the shorter, s, of which is normally held by the spring bearing against the stop-lug a, the body part of the lever being next to collar n; riveted or otherwise secured to the longer arm of said body part is a slender more or less elastic extension or arm t which reaches up through slot f and has its free end bent toward the picker stick and rounded, the rounded part t being suiiiciently offset so that it will contact with the picker stick without the picker contacting with said arm t in any of the different positions assumed by these parts. Since the arm t penetrates slot f it is conned thereby to the same plane of movement as the picker stick, wherefore the latter cannot possibly slip past it.

4That my device is more durable than the ordinary leatherstrap buffer or cushion commonly used and that it can be readily adjusted by simply shifting collar 0 one way or the other on shaft m to change the pressure of the spring or by similarly shifting collar a to alter the angularity of the lever member will be obvious. It'further opposes resistance to the picker stick which is not only the same on every checking action but increases and then decreases in a certain definite ratio, which qualities do not characterize the leather-strap device, and are due partly to the movement of the impact member or lever being in a fixed coursearound a pivot parallel to the axis of the picker stick, so that the two obtain a wiping contact on each other-partly to said member having a definite limit of movement toward the picker stick, and partly to a medium of resilience being employed that is long-lived and reliable in character and calculated always to return said member to its limit. By forming the lever member with its portion t lighter than its body part and elastic I at once obtain certain added resilience, which is advantageous, and reduce the inertia of said member. Another very important advantage of my device is that it insures return of the pickerstick and picker always in time for the latter to be out of the Way of the boxes when they are to be shifted, which the ordinary leatherstrap buer does not do.

Having thus fully described my invention, What'I claim as newr and desire to secure by Letters Patent is l. In combination, With the hatten-including structure of a loom, shuttle picking means therein, and means to check each picking stroke of the picking means including an elastic lever fulcrumed in position tobe impinged by the picking means near @the end of each such stroke and a spring opposing movement of said lever under the pressure of the picking means, said lever includingl a fulcrum part having an arm and a slender elastic impact-receiving part projecting from and attached to said arm.

2. In combination, With the batten including structure of a loom, shuttle picking means therein including a fulcrumed picker stick and a picker penetrated by the free end of said stick, and means to check each picking stroke of the picking means including a lever fulcrumedon an axis parallel with that of and in position to be impinged by the picker stick near the end oir' each such stroke and spring-held in said position, said structure having a slot receiving said lever and stick and conning the former in the same plane of movement as the latter.

In testimony whereof I aflix my signature.

CAMIEL VAN DE VOORT. 

